Did you set the fuses to ext. crystal / high frequency?Can you confirm that your ESC is 100% identical to the one shown on the pictures?Do you have another motor to test with?

Cheers,Heiko.

Hello,- I did not set any special stuff (apart from what ziss_dm suggested).- It looks pretty similar (apart from missing cap. from your picture), pleas check my picture.- I've tested with 3 motors (heavy 910rpm/V, lighter apr. 2000rpm/V and small Hacker 4100rpm/V) all have sam issues.- I've tested with your hex and issues are still here.

It's not neccesary to "change" the fuses, I just thougt maybe he didn't set them proper after the avr reset. We can try to pre-charge the capacitors, but this board works really well for me on all my motors. I have no startup problems at all, I can't imagine what's causing Andrej's problems.

Forget my question about BEMF caps, somhow I have missed that you are talking not about Mystery ESC. But another question still remains: Is it starting motor(s) without props?

@HeikoSo, this board has all n-FETs but they are not inverted?Why it is neccesary to change fuses?Maybe it is better to pre-charge bootstrap capacitors for this board?

regards,ziss_dm

The motors don't start even without props!@HeikoI have not intentionally change fuses (I'm so fresh in AVR programing) so I'm using ziss_dm's manual how to upload using Arduino as ISP programer and modified _make.cmd form SVN (I'm Mac user that's why modified).Regards.

crashlander wrote:I have not intentionally change fuses (I'm so fresh in AVR programing) so I'm using ziss_dm's manual how to upload using Arduino as ISP programer and modified _make.cmd form SVN (I'm Mac user that's why modified).Regards.

System wide configuration file is "/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/etc/avrdude.conf" User configuration file is "/Users/andrejj/.avrduderc" User configuration file does not exist or is not a regular file, skipping

I just tried Heiko's fuse settings (my original was different only in brown-out voltage). Since the symptoms are still present I'm posting avrdude output.

Hm, the log looks OK to me. Did you reset the AVR with the "-e" switch? Please connect one ESC directly to a reciever and try to start the motor this way. You can also record a short video that we can see/hear the problem .

I have problem with AVRootloader. I flashed ESC with software form first post on this site viewtopic.php?f=13&t=516&start=160 and set fusebits to High-Fuse: 0xCC and Low-Fuse: 0x2ENow i can connect with flash software, write and read EEPROM, erese FLASH. But if i want to write flash there is problem.

funth1ngs: I changed fusebits and its working great. Thank you very much.Only one question. Mystery 12A ESc like the others Mystery has two source of 5v on PCB. One is for atmega and second is for external device (receiver etc.) We can't power microprocesor for 3pin connector.Is it safe to flash (AVRootloader) ESC with connected battery?

There is one thing left, maybe we (or you ) can write a README which describes all the settings that can be configured with the hw/input files. Something like:

ziss_dm wrote:Almost.. rpm = (motor rpm * rotor poles) / 2.

ENOUGH_GOODIES - number of successful electrical rotations before checking RPM.RPM_START_MIN_RPM - minimal RPM for transition to runRPM_STEP_INITIAL, RPM_STEP_MAX - initially when there no back EMF, it starts commutation with RPM_STEP_INITIAL speed and accelerates up to RPM_STEP_MAX. For a good start you need to provide enough power to rotate motor (with load) at least at RPM_STEP_INITIAL and motor should be able to produce detectable back EMF somewhere inside this range.

RPM_RUN_MIN_RPM - below this RPM it exits from run mode. Currently we have 2 cases:- if current power is lower than PCT_PWR_MAX_STARTUP it goes to startup- if higher - reset

good idea about the description!What would help us unknowing living in the dark even more was an additional " raise this value, if bla, then it will do blabla".I obviously cannot help here, sorry, not suited to volunteer.

I strongly support the idea of making the firmware a Version 1.0. Would be even better if we could get a supplier (or aftermarket supplier) to provide ESCs with this firmware RTF. (now that I have come to taste the sweetness going back to stock for other copters is not desirable)

for a VTOL project with EDF I need 40A+ ESC. The Turbojet 60A seems to be a good candidate for this job.Because we have for hoovering high currents I want to modify the ESC.For this setup activ freerun mode is used, or PWM with the hi-Fets.The Turbojet ESC is pefect conditioned for this job, IR2101S hi-lo Drivers(output in phase with input), powered by a MAX662A charge pump.

My questions are: do you have a firmware for all N-Fet setup? do you have experience with IR2101 setups with hi-side PWM

My questions are: do you have a firmware for all N-Fet setup? do you have experience with IR2101 setups with hi-side PWM

1) Theoretically should work (this is just "bl-17a" schematic). I can create hw file later. But you would have to test it yourself. 2) There are support for high side PWM, but it would not work well with this BEMF sensing circuit (virtual neural point).3) There are support for complimentary PWM (activ freerun), but it is not tested really well.4) Currently fw has limit: 240 000 electrical RPM, with EDF you may hit this limit. (or may not. )5) Currently timing advance is fixed to 15deg which is good for low KV outrunners, but not sure for your setup.

Hi Ziss_dm, I'm having issues with TurnigyPlush6A (old ones, with Atmega proc) I traced the lines, and it seems that it has the same pinout as the Plush12A. However, if I flash the same firmware into a 12A and into a 6A, the 12A is working but the 6A does not start a motor. It newer reaches to a stabil rotation. It just shaking. I tried to play with the values without any success. Does anyone had a success with Turnigy Plush 6A ?EosBandi

Are you testing them with exactly the same setup? Same voltage/motor/prop?

EDIT: I have found schematic of Plush 6A: http://wii-esc.googlecode.com/svn/doc/Schematics/6a.pdfCould you please confirm that this matches your board, especially comparator connections. If yes, we would need to create special configuration for them as it slightly different from normal Plushes.

Are you testing them with exactly the same setup? Same voltage/motor/prop?

EDIT: I have found schematic of Plush 6A: http://wii-esc.googlecode.com/svn/doc/Schematics/6a.pdfCould you please confirm that this matches your board, especially comparator connections. If yes, we would need to create special configuration for them as it slightly different from normal Plushes.